236 



color violacea. Obtained in the equatorial Atlantic and figured by 

 Mr. Dana, with notes. 



Closely allied to A. Lesueuri, Voy. de la Bonite, pi. 20 ; f. 1-15. 



Atlanta cunicula. T. fragilissima, pellucida, nautiloidea, sub- 

 circularis, compressa, carina latissima cincta : apertura elliptica, 

 acutangularis. Obtained by Mr. Dana, in lat. 28° N., long. 178° E., 

 to the westward of the Sandwich Islands. 



The animal is very different from that belonging to the last species. 



Atlanta violacea. T. nautiloidea, vix compressa, violacea, 

 valde carinata : anfractus quatuor sensim crescentes : apertura ellip- 

 tica, angulis rotundatis. Long, integ. f ; lat. ^ poll. Found in the 

 stomach of a Bonito, lat. 3° S., long. 20° W. Figured by Mr. 

 Drayton. 



Atlanta tessellata. T. nautiloidea, compressa, carina angusta 

 cincta : anfr. 4, maculis quadratis violaceis seriatim dispositis, ornati ; 

 anfr. ultimo cito crescente : apertura angusta, ad angulum internum 

 rotundata. Diam. max. 1 ; diam. transv. ^ poll. Found with the 

 preceding. 



The remarkable series of quadrate spots is a very obvious distinc- 

 tive character. 



Cynthia amphora. C. subglobosa, ochracea, tenuis, longitudi- 

 naliter sulcis remotis segmentata et omnimode subtiliter corrugata. 

 Orificia approximata, magna, labiis eversis et incrassatis. Alt. l£ ; 

 circumf. \ poll. Found abreast Fort Santa Cruz, Rio Janeiro. 



Phallusia violacea. T. nigro-violacea, erecta, ovato-cylin- 

 dracea, coriacea, laevigata, nitida ; orificia subequalia, parva, mamil- 

 las subglobosas perforantia. Alt. 2.J ; diam. 1.J poll. Taken off the 

 north point of the entrance to Rio Janeiro harbor. Couthouy. 



Ascidia monstrans. A. subglobosa, sursum porrecta et versus 

 aperturam buccalem sensim angustata : apertura excretoria parva, 

 valde inferior ; tunica tenuis, la^vis, ex olivaceo aurantiaco demum 

 sanguinea : labiis simplicibus, ciliatis. Alt. ad 1 poll. ; diam. circiter 



| longitudinis. From the entrance to the harbor of Rio Janeiro. 



Couthouy. 



Boltenia coacta. B. ovata, rigida, lanata, longitudinaliter 

 rugosa, ochraceo-olivacea, postice pedunculata : apertura3 subter- 

 minales, remote, cruciata?, inermes, intus rosacea?, mamillas obtrun- 

 cantes. Long. 2^; diam. circiter l£ poll. Dredged in 16 fathoms. 

 Orange Harbor. Couthouy. 



