232 Records of the Indian Museum. [Vol. IX^ 



6. Scalpcllum woodmasoni, Annandale. 



Ann. Mag. Nat. Hist. (7) XVII, p. 39 (1906) ; ///. Zool. 'In- 

 vestigator,' Crust. Ent., pi. I, fig. 7 (1907). 



Only the type-specimen is known. It is from ' Investigator ' 

 station 183 in the Arabian Sea: Lat. 23°8'22" N., Long. 65° 49'45" 

 B. ; 890 fathoms. 



Type No. VV Crust. Ind, Mus. 



7. Scalpellum albatrossianum, Pilsbry. 



Pilsbry, U. S. Nat. Mus. Bidl. 60, p. 54, fig. 19 (1907); An- 

 nandale, ///. Zool. ' Investigator,'' Crust. Ent., pi. Ill, fig. 

 10 (1908). 



Only two specimens of this species are known; the type, 

 which was taken in the N. Atlantic off Cape Hatteras in 2045 

 fathoms by the ' Albatross ' , and one taken by the ' Investigator ' 

 in 1997 fathoms at station no in the Bay of Bengal : Lat. 9^34' 

 N., Long. 85°43'i5" E. 



So far as I can judge from Pilsbry' s figure, there is hardly any 

 difference between the specimens, but he says that the carinal 

 umbo is apical, while I class it as subapical. In the Indian speci- 

 men this umbo, as Pilsbry says was the case with the American one, 

 is in contact with the terga and, therefore, appears to be terminal. 

 There is, however, a short continuation of the valve hidden 

 between the terga. The species is closely related to S. woodmasoni , 

 from which it may be distinguished by its broader scutum and 

 hourglass-shaped inframedian latus. 



The cirri and mouth-parts closely resemble those of 5. pacifi- 

 cum but the anterior ramus of the first cirrus is relatively broader, 

 the outer tooth of the mandible is relatively larger and the two 

 inner teeth of the appendage lie closer together. The anal ap- 

 pendages of the two species are also closely similar, but those of 

 5. albatrossianum bear a larger bunch of bristles at the apex. In 

 spite of the fact that S. pacificum falls into a different section of 

 the sub-genus technically, I see no difficulty in believing it to be 

 closely allied to S. albatrossianum. 



The figure in the ' Investigator ' Illustrations was prepared 

 from the Indian specimen, before it was realised that the species 

 was identical with the American one. 



Type in the U. S. Nat. Mus. 



8. Scalpcllum gruvelii, Annandale. 



Scalpellum gruvelii and var. quadratum, Annandale, Ann. 

 Mag. Nat. Hist. (7) XVII, p. 390 (1906); ///. Zool. 

 ' Investigator,' Crust. Ent., pi. I, fig. i; pi. II, figs, i, la 

 and 3 (1907); Herdman's Rep. Pearl Oyster Fisheries, V, 



