A. -E. Verrlll — Additions to the luiHita of the Bermudas. 25 



surface olive-green, spotted with white. Rhinophores green, with 

 white spots and edges. 



Length, in life, up to 100'""' ; breadth, about 50""". 



The shell is firm, calcareous, rather oblong, with the beak produced 

 and grooved or sometimes spoon-shaped, being concavely excavated ; 

 the sinus is incurved and has the inner margin thickened ; anterior 

 end obliquely truncated and angular ; a thin, high, median, vertical 

 crest or keel runs about ^ of the length, on the inside. Left margin 

 nearly straight or slightly incurved. The outer surface is faintly 

 radially ribbed. The shell vai'ies considerably in form in the several 

 examples examined, and especially in the ratios of length to breadth, 

 as shown in the two figures given. The beak may be acute or spoon- 

 shaped ; in one it was wholly lacking, due apparently to injury and 

 partial repair. In one specimen the shell was in two parts, having 

 been broken before death and only slightly repaired. 



Hungry Bay, under stones at low tide, April 5, 1901, 5 specimens. 

 (A. H. Y.) Another specimen was taken in May by Mr. W. G. 

 VanName. 



Tethys (Aplysia) morio V., sp. nov. 



Plate III. Figures 5, 5o. 



A very large species, over a foot long, dark umber-brown or nearly 

 black, without definite spots, but with black stripes on the head, and 

 with very large broadly overlapping lateral flaps. 



Body thick and stout, swollen, verj'- obtuse posteriorly. Head 

 and neck thick and stout (but perhaps not seen fully extended). 

 Lateral natatorial flaps very wide and overlapping about half their 

 breadth, entirely free posteriorly, and extending to the end of the 

 short foot. Rhinophores rather small and short, conical. Tentacles 

 large and very broad, foliaceous, with thin expanded margins. 



Color of body and exterior of flaps very dark umber-brown or 

 brownish black, with few obscure dusky blotches on the sides of foot 

 and with a purplish tinge along the edges of the flaps. Head, above 

 and on the sides, covered with a number of narrow, purplish black, 

 longitudinal stripes. 



Length, in life, when not fully extended, 400™™ ; height, 145'"". 



The shell is very thin, transparent, pale yellow, oblong-ovate, 

 obtusely rounded anteriorly', with the posterior sinus long and only 

 slightly incurved ; beak rather prominent, scarcely incurved, with a 

 reflexed membranous edge, which also extends along both posterior 

 margins. In the formalin preparation there is no calcareous layer 

 present. The surface is concentrically undulated and faintly longi- 



