PEREZ FARFANTE: REVISION OF GENUS PSEUDARISTEUS 



species in the Zoological Survey of India, and next 

 to the number 6713/9, corresponding to the first 

 female cited by Wood-Mason, he added "Types of 

 the species". Immediately following it is the regis- 

 tration number, 3175/9, of the second female (Maya 

 Deb fn. 2). Alcock's referral to "Types" indicate that 

 he did not intend to select the first female as a lecto- 

 type; moreover, since he did not specifically desig- 

 nate it as such, according to the Article 74a of the 

 International Code of Zoological Nomenclature of 

 1961 it cannot be so considered. Maya Deb has also 

 informed me that the female from Investigator sta- 

 tion 116 is in the Zoological Survey of India accom- 

 panied by the registration number cited above, but 

 that the other female recorded by Wood-Mason 

 could not be located. Because two other species, P. 

 kathleenae and P. protensus, have been confused 

 with A. crassipes and conceivably because the miss- 

 ing syntype might prove to be conspecific with one 

 of them, I hereby designate the female in the Zoo- 

 logical Survey of India assigned registration num- 

 ber 6713/9 as the lectotype oi Aristaeus crassipes 

 Wood-Mason, 1891. 



Through the kindness of Maya Deb and H. C. 

 Ghosh, both of the ZSI, who examined the lectotype 

 and provided me with information on specific mor- 

 phological features, clear drawings, and photo- 

 graphs, I have been able to ascertain the identity 

 of P. crassipes. As stated above, the characters used 

 by Wood-Mason in the description of P. crassipes 

 were inadequate for distinguishing it from 2 other 

 species and this deficiency was no doubt responsible 

 for the assignments of closely allied forms to P. 

 crassipes (De Man 1911, 1913; Kemp and Sewell 

 1912; Balss 1925). Kemp and Sewell, however, noted 

 that among males of P. crassipes in the ZSI there 

 were two types of third maxillipeds which they 

 described and illustrated. They stated further that 

 it was possible that the males exhibiting one of the 

 maxilliped types should be recognized as belonging 

 to a new variety. The "new variety" is described 

 herein as P. kathleenae. 



Pseudaristeus protensus, new species 



Figures 4D, 9, 14 



Material. 



Holotype: 9, USNM 42681, 40 mm CL, length of 

 median plate of sternite XIII 7.1 mm, basal width 

 1.5 mm; type-locality W of Everal Gujarat, India 

 (Arabian Sea); 19°51'30"N, 69°07'30"E; 1,569 m; 

 sand and mud; 14 April 1906; Investigator stn 370. 



Paratype: 9, MP, off Godavar, India; 869 m; 

 Investigator. 



Diagnosis.— Optic calathus relatively short, mesial 

 margin length equal distal width. Anterolateral 

 carina lacking. Ventral extremity of cervical carina 

 forming sharp-edged arc. Posterior extremity of 

 hepatic sulcus turned ventrally. Third article of 

 antennular peduncle in females not expanded later- 

 ally. Pereopods not covered with minute setae. 

 Petasma unknown. Thelycum with plate of sternite 

 XIV very short and produced in long anterolateral 

 hoods; median plate of sternite XIII very long 

 (almost reaching spine on sternite XII), narrow 

 (maximum width 0.40 length), and not expanded 

 posterolaterally in conspicuous prominences. 



Description.— Body of holotype and paratype (only 

 two specimens available) slender, studded with 

 minute setiferous punctations and extremely minute 

 setae. Rostrum broken. Anntenal spine broken; 

 branchiostegal spine long, slender, and acutely 

 pointed. Cervical sulcus crossing or just reaching 

 postrostral carina at about 0.45 CL from orbital 

 margin, with ventral part turning anteriorly; accom- 

 panying carina blunt except for sharp, strongly 

 arched ventral extremity; postcervical sulcus deep, 

 almost reaching, but not crossing, postrostral carina 

 at about 0.70 CL from orbital margin, and con- 

 siderably extending anteriorly. Postrostral carina, 

 extending to 0.85 CL from orbital margin, well 

 marked and sharp to cervical sulcus, low and blunt 

 posteriorly, and followed by small tubercle situated 

 near posterior margin of carapace. Anterolateral 

 carina lacking; gastro-orbital carina strong; anten- 

 nal carina relatively short; branchiostegal-hepatic 

 carina long, raised and sharp. Orbito-antennal sulcus 

 shallow; deep hepatic sulcus fusing with branchio- 

 cardiac sulcus, where turning obliquely almost 

 ventrally forming small branch nearly reaching 

 branchiostegite; branchiocardiac sulcus, accom- 

 panied by sharp carina, deep and long, extending 

 posteriorly to near margin of carapace; strong, 

 arched ridge (disposal dorsal to posterior part of 

 hepatic sulcus and anterior part of branchiocardiac 

 sulcus) delimited dorsally by deep groove, latter con- 

 tinuous posteriorly with postcervical sulcus but not 

 extending anteriorly to cervical sulcus. 



Eye (Fig. AD) with optic calathus relatively short, 

 length of mesial margin equal width of distal ex- 

 tremity; mesial tubercle strong and situated at distal 

 0.33 length of mesial margin. 



Antennular peduncle with stylocerite produced in 

 sharply pointed spine almost reaching or falling 



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